How a Heat Wave and Mysterious Disease Crashed California's Kelp Forest

Ocean heat waves and disease are toppling coastal ecosystems. In just four years, one stretch of California kelp forest turned into a desert of sea urchins.

By Leslie Nemo
Oct 24, 2019 10:00 PMNov 19, 2019 3:56 PM
bullkelp
California bull kelp. (Credit: Peggy Foreman, NOAA Fisheries)

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Every year, a forest of bull kelp springs up from the ocean floor along 200 miles of California coast, fostering a regenerated, thriving ecosystem each time it appears.

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